<!DOCTYPE html>

<html>
    <head>
        <meta charset="UTF-8">
        <title>
            {% block title %}
                页面标题
            {% endblock%}
        </title>
        {% block cssLinks %}
            <link rel="stylesheet" href="/css/layout.css">
        {% endblock %}
    </head>
    <body>
        {% block content %}
            页面内容
        {% endblock %}
    </body>
</html>